diff --git a/package.json b/package.json
index 3e65ab1..a5c97d5 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@coral-xyz/anchor": "^0.29.0",
-    "@drift-labs/sdk": "2.55.0-beta.4",
+    "@drift-labs/sdk": "2.56.0-beta.0",
     "@opentelemetry/api": "^1.1.0",
     "@opentelemetry/auto-instrumentations-node": "^0.31.1",
     "@opentelemetry/exporter-prometheus": "^0.31.0",
diff --git a/src/dlob-subscriber/DLOBSubscriberIO.ts b/src/dlob-subscriber/DLOBSubscriberIO.ts
index a630ada..b67b1b4 100644
--- a/src/dlob-subscriber/DLOBSubscriberIO.ts
+++ b/src/dlob-subscriber/DLOBSubscriberIO.ts
@@ -10,6 +10,7 @@ import {
 import { RedisClient } from '../utils/redisClient';
 import {
 	SubscriberLookup,
+	addMarketSlotToResponse,
 	addOracletoResponse,
 	l2WithBNToStrings,
 } from '../utils/utils';
@@ -96,6 +97,10 @@ export class DLOBSubscriberIO extends DLOBSubscriber {
 		const grouping = l2Args.grouping;
 		const { marketName, ...l2FuncArgs } = l2Args;
 		const l2 = this.getL2(l2FuncArgs);
+		const slot = l2.slot;
+		if (slot) {
+			delete l2.slot;
+		}
 		const marketType = isVariant(l2Args.marketType, 'perp') ? 'perp' : 'spot';
 		let l2Formatted: any;
 		if (grouping) {
@@ -119,13 +124,20 @@ export class DLOBSubscriberIO extends DLOBSubscriber {
 		l2Formatted['marketName'] = marketName?.toUpperCase();
 		l2Formatted['marketType'] = marketType?.toLowerCase();
 		l2Formatted['marketIndex'] = l2Args.marketIndex;
+		l2Formatted['slot'] = slot;
 		addOracletoResponse(
 			l2Formatted,
 			this.driftClient,
 			l2Args.marketType,
 			l2Args.marketIndex
 		);
-
+		addMarketSlotToResponse(
+			l2Formatted,
+			this.driftClient,
+			l2Args.marketType,
+			l2Args.marketIndex
+		);
+	
 		const l2Formatted_depth100 = Object.assign({}, l2Formatted, {
 			bids: l2Formatted.bids.slice(0, 100),
 			asks: l2Formatted.asks.slice(0, 100),
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index d8530ba..831a7fb 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -132,6 +132,21 @@ export const addOracletoResponse = (
 	}
 };
 
+export const addMarketSlotToResponse = (
+	response: L2OrderBook | L3OrderBook,
+	driftClient: DriftClient,
+	marketType: MarketType,
+	marketIndex: number
+): void => {
+	let marketSlot: number;
+	if (isVariant(marketType, 'perp')) {
+		marketSlot = driftClient.accountSubscriber.getMarketAccountAndSlot(marketIndex).slot;
+	} else {
+		marketSlot = driftClient.accountSubscriber.getSpotMarketAccountAndSlot(marketIndex).slot;
+	}
+	response['marketSlot'] = marketSlot;
+};
+
 /**
  * Takes in a req.query like: `{
  * 		marketName: 'SOL-PERP,BTC-PERP,ETH-PERP',
diff --git a/yarn.lock b/yarn.lock
index 2e2297d..6842f33 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -115,10 +115,10 @@
     enabled "2.0.x"
     kuler "^2.0.0"
 
-"@drift-labs/sdk@2.55.0-beta.4":
-  version "2.55.0-beta.4"
-  resolved "https://registry.yarnpkg.com/@drift-labs/sdk/-/sdk-2.55.0-beta.4.tgz#2a43dc1f15b323f891ab33797495dbcb6d9d214e"
-  integrity sha512-9SFXsZRKYtk+OMFpWGN1L2GuicLqnUS7kveQmf6G8SVjsMrePo7udkfFJBThyfD7O1yBX4QiShBdZeIDTwsgHQ==
+"@drift-labs/sdk@2.56.0-beta.0":
+  version "2.56.0-beta.0"
+  resolved "https://registry.yarnpkg.com/@drift-labs/sdk/-/sdk-2.56.0-beta.0.tgz#2ed7b5f2cc9f1597dd6a16512b6f42716d11b624"
+  integrity sha512-64byprjkruQNmhIxJ/hNTfzFQCf28ls4zHDSw6Wx5Bc+9nj1g4ZwGy+22nfzdHCwres/KSXnkATIwE8BqTgAKg==
   dependencies:
     "@coral-xyz/anchor" "0.28.1-beta.2"
     "@ellipsis-labs/phoenix-sdk" "^1.4.2"